Cylindrically polarized nondiffracting optical pulses

Ornigotti, Marco; Conti, Claudio; Szameit, Alexander

doi:10.1088/2040-8978/18/7/075605

Cited by 12 publications

(5 citation statements)

References 55 publications

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“…Although Brittingham's FWM was a vectorial solution to Maxwell's equation [25], work on ST wave packets since has dealt almost exclusively with scalar fields [156,157]. More recently, introducing polarization structures into paraxial ST wave packets has been explored [351], including vector-beam structures impressed upon ST light sheets [350]; Fig. 52(c).…”

Section: State-of-the-art Of St Wave Packetsmentioning

confidence: 99%

Space-time wave packets

Yessenov¹,

Hall²,

Schepler³

et al. 2022

Preprint

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Space-time' (ST) wave packets constitute a broad class of pulsed optical fields that are rigidly transported in linear media without diffraction or dispersion, and are therefore propagation-invariant in absence of optical nonlinearities or waveguiding structures. Such wave packets exhibit unique characteristics, such as controllable group velocities in free space and exotic refractive phenomena. At the root of of these behaviors is a fundamental feature underpinning ST wave packets: their spectra are not separable with respect to the spatial and temporal degrees of freedom. Indeed, the spatio-temporal structure is endowed with non-differentiable angular dispersion, in which each spatial frequency is associated with a single prescribed wavelength. Furthermore, deviation from this particular spatio-temporal structure yields novel behaviors that depart from propagation invariance in a precise manner, such as acceleration with an arbitrary axial distribution of the group velocity, tunable dispersion profiles, and Talbot effects in space-time. Although the basic concept of ST wave packets has been known since the 1980's, only very recently has rapid experimental development emerged. These advances are made possible by innovations in spatio-temporal Fourier synthesis, thereby opening a new frontier for structured light at the intersection of beam optics and ultrafast optics. Furthermore, a plethora of novel spatio-temporally structured optical fields (such as flying-focus wave packets, toroidal pulses, and ST optical vortices) are now providing a swathe of surprising characteristics, ranging from tunable group velocities to transverse orbital angular momentum. We review the historical development of ST wave packets, describe the new experimental approach for their efficient synthesis, and enumerate the various new results and potential applications for ST wave packets and other spatio-temporally structured fields that are rapidly accumulating, before casting an eye on a future roadmap for this field.

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Section: State-of-the-art Of St Wave Packetsmentioning

confidence: 99%

Space-time wave packets

Yessenov¹,

Hall²,

Schepler³

et al. 2022

Preprint

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“…an azimuthally polarised vector beam [72][73][74][75][76][77] of transverse wavenumber k k z 0 2 2 k = -| | propagating in the z  direction. This leads us to suggest, tentatively, that a good approximation to our electric ring in the visible domain might be generated in the laboratory by superposing counter-propagating azimuthally polarised vector beams of light, each with an appropriate spread of transverse wave numbers.…”

Section: Visible Domainmentioning

confidence: 99%

“…This leads us to suggest, tentatively, that a good approximation to our electric ring in the visible domain might be generated in the laboratory by superposing counter-propagating azimuthally polarised vector beams of light, each with an appropriate spread of transverse wave numbers. An analogous arrangement with radially polarised [37,72,73,74,75,77] beams might be used to generate a good approximation to our electric globule. Electric rings and electric globules created in this way could be used in turn as building blocks to generate more elaborate unusual electromagnetic disturbances in the visible domain, following the recipes given in section 3.2, for example.…”

Section: Visible Domainmentioning

confidence: 99%

Monochromatic knots and other unusual electromagnetic disturbances: light localised in 3D

Cameron

2018

J. Phys. Commun.

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We introduce and examine a collection of unusual electromagnetic disturbances. Each of these is an exact, monochromatic solution of Maxwell's equations in free space with looped electric and magnetic field lines of finite extent and a localised appearance in all three spatial dimensions. Included are the first explicit examples of monochromatic electromagnetic knots. We also consider the generation of our unusual electromagnetic disturbances in the laboratory, at both low and high frequencies, and highlight possible directions for future research, including the use of unusual electromagnetic disturbances as the basis of a new form of three-dimensional display.

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“…Despite the progress described above, there has been a relative shortage of research on the potential orbital angular momentum (OAM) of localized pulses, with a few exceptions such as generalized X-waves in free space [17,18], as well as in nondispersive media [13].…”

Section: Introductionmentioning

confidence: 99%

Localized waves carrying orbital angular momentum in optical fibers

Ruano

Robson

Ornigotti

2021

J. Opt.

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We consider the effect of orbital angular momentum (OAM) on localized waves in optical fibers using theory and numerical simulations, focusing on splash pulses and focus wave modes. For splash pulses, our results show that they may carry OAM only up to a certain maximal value. We also examine how one can optically excite these OAM-carrying modes, and discuss potential applications in communications, sensing, and signal filtering.

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Cylindrically polarized nondiffracting optical pulses

Cited by 12 publications

References 55 publications

Space-time wave packets

Space-time wave packets

Monochromatic knots and other unusual electromagnetic disturbances: light localised in 3D

Localized waves carrying orbital angular momentum in optical fibers

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